The hum of the engine, the purr of the road beneath the tires - it's all a symphony to her, a rhythm that drives her desire. She watches him, his hands gripping the wheel, his knuckles white with tension. She reaches out, her fingers brushing his thigh, feeling the muscles taut and ready. She inches higher, her palm cupping him through his jeans. He sucks in a breath, his eyes darting to hers before returning to the road. She unbuckles, leaning over, her breath hot on his ear. 'Pull over,' she whispers, her voice low and sultry. He does, the car lurching to a stop. She turns to him, her hand moving to his zipper, her fingers working their way inside, finding him hard and ready. She strokes, her thumb rubbing the pre-cum from his tip, before dipping her finger inside, fucking him slowly, deeply, as he groans, his hips moving in time with her hand.